Universitas Indonesia, 1999
UI - Skripsi (Membership)
edited by Boris Imelik and Jacques C. Vedrine
Plenum Press, 1992
Buku Teks
James Njuguna
Springer Berlin Springer, 2016
Buku Teks
Hughes, Owen F
John Wiley & Sons, 1983
Buku Teks
Savitri Octaviani, author
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2012
UI - Skripsi (Open)